Subaru FORESTER 2001 Service Manual page 303

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (Diagnostics)
No.
3 CHECK PRESSURE SENSOR.
1) Start the engine and warm-up engine until
coolant temperature is greater than 60°C
(140°F).
2) Place the shift lever in the selector lever in
"N" or "P" position.
3) Turn A/C switch to OFF.
4) Turn all accessory switches to OFF.
5) Read data of intake manifold pressure sen-
sor signal using Subaru Select Monitor or
OBD-II general scan tool.
NOTE:
¼ Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(DOHC TURBO)-36, Subaru
Select Monitor.>
¼ OBD-II general scan tool
For detailed operation procedure, refer to the
OBD-II General Scan Tool Instruction Manual.
Specification:
¼ Intake manifold absolute pressure
Ignition ON
73.3 — 106.6 kPa (550 — 800 mmHg,
21.65 — 31.50 inHg)
Idling
20.0 — 46.7 kPa (150 — 350 mmHg,
5.91 — 13.78 inHg)
4 CHECK THROTTLE POSITION.
Read data of throttle position signal using
Subaru Select Monitor or OBD-II general scan
tool.
NOTE:
¼ Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(DOHC TURBO)-36, Subaru
Select Monitor.>
¼ OBD-II general scan tool
For detailed operation procedure, refer to the
OBD-II General Scan Tool Instruction Manual.
5 CHECK THROTTLE POSITION.
Step
Is the value within the
specifications?
Is throttle positioning ratio
equal to or less than 5%
when throttle is fully
closed?
Is throttle positioning ratio
equal to or more than 85%
when throttle is fully open?
EN(DOHC TURBO)-302
Check Yes
Go to step 4.
Go to step 5.
Replace pressure
sensor. <Ref. to
FU(DOHC
TURBO)-35, Pres-
sure Sensor.>
No
Replace pressure
sensor. <Ref. to
FU(DOHC
TURBO)-35, Pres-
sure Sensor.>
Replace throttle
position sensor.
<Ref. to
FU(DOHC
TURBO)-33,
Throttle Position
Sensor.>
Replace throttle
position sensor.
<Ref. to
FU(DOHC
TURBO)-33,
Throttle Position
Sensor.>